Well, I'm happy to say that the Ford dealership I go to is very thorough, and does not try and add anything else to the bill. I actually watch them while they work on the RV. In my younger days, I was a mechanic, and so was my father, so I am always skeptical of others working on my vehicles. But old age and a lot of injuries make my body remind me to let others do some of the work instead. The dealership knows I was a mechanic, so maybe they don't try anything with me? Don't know, but I am impressed with their work so far